Hi Drake,

Could you please provide more information, 
array size, inverter make / model, conductor size, 
breaker rating, breaker brand?

Dick 
Solarwind Electric
Bradford, VT


--- You wrote:
If I'm following this thread correctly,  the 
relay is to break the flow of AC current to the 
battery based inverter (Outback) from a direct 
grid tie inverter when the grid is down and the 
batteries are full.  The AC coupling here would 
be done at the protected loads panel, fed from the AC Out of the Outback.

We are having problems breaking the AC from 
direct grid tie inverters feeding directly into 
the grid.  When the relays open, the breakers 
that the inverters feed into, trip.  They don't 
always trip, but trip randomly.

The relays are open frame, similar to the ones 
you describe below.  Why are we having this 
problem, as it seems that what we are doing is common practice?

Thanks for your help.

Drake
--- end of quote ---

